* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  margin: 0;
  padding: 10px 10px;
  color: #333;
}

body {
  background: #fff;
}

body div {
  font-size: 20rem;
  line-height: 50vh;
  width: 100px;
  height: 100px;
  text-align: center;
}
